Suspension polymerization process for the preparation of polymeric material from gaseous and non-gaseous monomers
US5177153A · kind A · utility
4Cited by
15References
25Claims
0Family size
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Key dates
| Filing date | Jun 10, 1992 |
| Grant date | Jan 5, 1993 |
| Priority date | — |
| Expiry date | Jun 10, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F236/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A suspension polymerization process for the preparation of a polymeric material formed from at least two monomers, a non-gaseous monomer and a gaseous monomer. The composition of the beads or particles of the polymeric material is controlled by adding gaseous monomer to the vapor phase after polymerization of about 5% to about 90% by weight of the non-gaseous monomer or by removing a portion or substantially all of the gaseous monomer in the vapor phase before polymerization of about 70% by weight of the gaseous monomer in the aqueous suspension, or a combination thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.